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comparison Framework/Toolbox/DownloadStack.h @ 0:351ab0da0150

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initial commit
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 14 Oct 2016 15:34:11 +0200
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children 7207a407bcd8
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-1:000000000000 0:351ab0da0150
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 *
6 * This program is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
10 *
11 * In addition, as a special exception, the copyright holders of this
12 * program give permission to link the code of its release with the
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
14 * that use the same license as the "OpenSSL" library), and distribute
15 * the linked executables. You must obey the GNU General Public License
16 * in all respects for all of the code used other than "OpenSSL". If you
17 * modify file(s) with this exception, you may extend this exception to
18 * your version of the file(s), but you are not obligated to do so. If
19 * you do not wish to do so, delete this exception statement from your
20 * version. If you delete this exception statement from all source files
21 * in the program, then also delete it here.
22 *
23 * This program is distributed in the hope that it will be useful, but
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 **/
31
32
33 #pragma once
34
35 #include <vector>
36 #include <boost/noncopyable.hpp>
37 #include <boost/thread/mutex.hpp>
38
39 namespace OrthancStone
40 {
41 class DownloadStack : public boost::noncopyable
42 {
43 private:
44 static const int NIL = -1;
45
46 // This is a doubly-linked list
47 struct Node
48 {
49 int next_;
50 int prev_;
51 bool dequeued_;
52 };
53
54 boost::mutex mutex_;
55 std::vector<Node> nodes_;
56 int firstNode_;
57
58 bool CheckInvariants() const;
59
60 void SetTopNodeInternal(unsigned int value);
61
62 public:
63 DownloadStack(unsigned int size);
64
65 ~DownloadStack();
66
67 bool Pop(unsigned int& value);
68
69 class Writer : public boost::noncopyable
70 {
71 private:
72 DownloadStack& that_;
73 boost::mutex::scoped_lock lock_;
74
75 public:
76 Writer(DownloadStack& that) :
77 that_(that),
78 lock_(that.mutex_)
79 {
80 }
81
82 void SetTopNode(unsigned int value);
83
84 void SetTopNodePermissive(int value);
85 };
86 };
87 }